Cooling apparatus.



PATENTED APR. 9, 1907.

W. HELM. COOLING APPARATUS. AEPLIOATION FILED MAR. 10, 1904.

Fig.2.

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urrah WTLPIELM HELM, 0F BERLIN, GERMANY.

@QQLENG APPARATUS scenes.

Specification of Letters Patent.

'llPatented April 9, 1997.

a uaeonnea March i0. 190%. Endemic-197,458-

T0 at whom it may concern:

Be it known that l, WILHELM HELM, a subject of the liing of Prussia, residing in Berlin, Anhaltstrasse 8, Germany, have inyented certain new and useful Improvements n {looling Apparatus, of which the following is a specification.

My invention aims to provide certain improvements in cooling apparatus, and especially in the type of apparatus which uses ice, preferably cracked into small pieces, or a cooling mixture, such as ice and. salt. The liquid formed by the melting of the ice is used for the cooling of the desired material. The

.material to becooled extracts only a portion of the cold of the liquid, leaving it still at a temperature below that of the material, so that by conducting a portion of it after-its first use back into the icereceptacle and passing it again over the ice it will receive an additional amount of cooling and will at the same time melt down a certain additional quantity of ice. This exceedingly cold liquid may be employed for various purposessuch as the cooling of other liquids or of chambers in which meats, fruits, or the like are kept,

. tion applied to the cooling of a vessel of milk or other liquid. Fig. 3 illustrates, in section and on an enlarged scale, the connections of the inlet side of the pump.

Referring to the drawings, the ice or mixture of ice and salt or other cooling mixture is arranged in the receptacle (1, which is preferably provided with a jacket I) to retain the cold. It is in this receptacle that the cooling of the liquid takes place. The cold liquid collecting in the bottom of the receptacle a passes through a tube 0, pump d, and tube e,

to a receptacle f containing the milk. The

cooling liquid passes through a coil or other suitable arrangement within this receptacle. After the extraction of the cold as far as possible from the liquid it passes out of the receptacle hf through a tube g, from which it branc esl'off into two tubes i and 7c. The tube 2' is provided with a cock m and serves for running off theexcess of liquid at arate controllable by the cock. The tube 7c returns into the receptacle a and terminates in this receptacle preferably in a spraying-tube Z, through which the remainding part of the liquid from the milk-can f is again run over and through the ice and melts an additional portion thereof, at the same time lowering its own temperature and with the additional portion s0 melted passes again through the pump and the milk-can as before. The portion of the liquid which is branched ofi at i is still of somewhat lower temperature than the milk and may beused for other purposes-es, for

example, for a preliminary cooling of the ;milk which is to be conducted into the can or tank f. The spraying-tubal is preferably arranged in the lower-part of the receptacle 0, and its apertures may advantageously be directed downwardly, so that it is always-the lower part of the ice-supplywhich is being most melted and used, the ice above th@ spraying-tulip being a reserve supply. In order to facilitate cleaning of the sprayingtube, it is preferably made removable.

The apparatus admits of very nice regulation according to the quantity of material to be cooled and the amount of reduction of temperature to be obtained by operating the pump d more quickly or more slowly and by opening the cock m more or less. Thus the apparatus operates in the manner of a cooling or refrigerating machine. in order to prevent as much as possible the obstructing of the orifices of the sprayingtube, the outlet from the receptacle through which the liquid passes to the pump'may be covered with a strainer r. Also within the tube 0 is a strainer o, fastened to the end plug p, which separates the tube a into two parts in such a way that the cooling liquid coming from the receptacle 0 has to pass through this strainer 0 in order to enter the branch 8 leading to the pump.

In order that the strainer 0 may be withdrawn without stopping the action of the 1 pump and the other parts of the apparatus so as to clean the strainer, there is provided closes when the strainer is withdrawn and is automatically opened by the insertion of the strainer into position.

A suitable construction of the receptacle If is indicated in section in Fig. 1 The coo ing liquid passes from the pump (1 through the pipe e to the inlet'of the helically-corrugated cylinder or coi f ac. After passin through said cylinder the cooling liqui passes from the outlet f 2 of the latter into the pipe g, from which it branches off, as explained, into the two tubes '1', and k. Milk or other material to be cooled is poured into the funnel f whence it runs through the openings f 4 downward over the outer surface of the helically-corrugated cylinder x, extracting the gradually-increased co d of the helix and then running into the funnel f from which it can be withdrawn at a very low temperature through-the outlet f Though I have described with great particularity of detail certain embodiments of the invention, yet it is not to be understood that the invention is limited to the particular embodiments described. Various mod fications in detail and in the arrangement and combination of the parts may be made by those skilled in the art without departure from the invention.

What I claim. is

1. An apparatus for cooling by means of ice or a cooling mixture, comprising in combination a receptacle 0, for containing the ice or cooling mixture, a pump for circulating liquid to the material to be cooled and over the ice again, means for withdrawing the melted liquid from the receptacle c and passing it to said pump, a removable strainer between said pump and the outlet of the recep tacle a, a valve in said outlet, and means whereby the removalof said strainer causes the closing ofsaid valve and the insertion of said strainer to its normal position causes the opening of said valve.

2. An apparatus for cooling by means of ice or cooling mixture, comprising an icecontainin receptacle, means for circulatin the melte liquid to the material to be coole and over the ice, said means including a pump, an outlet-valve in the bottom of said receptacle, aremovable strainer between said pump and the outlet of the receptacle, and a projection carried by said strainer adapted to engage and open said valve, when said strainer is in place.

In witness whereof I have hereunto si ed my name in the pr'esence'of two subscri ing witnesses.

. WILHELM HELM. Witnesses JOHANNES Hnm, WOLDEMAR HAUPm 

